Locomotive-brake



W. B. GUERNSEY & W..B. TURNER. I

(No Model.)

LOOOMOTIVE BRAKE:

N0. 259,004i Patented June'6, 1882.

flib UNITED STATES PATENT OFFICE.*

WILLIAM B. GUERNSEY, OF NORWICH, AND WILLIAM B. TURNER, OF NEW YORK, N.Y., ASSIGNORS OF ONE-THIRD TO THE TORREY AUTOMATIC BRAKE COMPANY, OF NEWYORK.

LOCOMOTlVE-BR AKE.

SPECIFICATION forming part of Letters Patent No. 259,004, dated June 6,1882.

Application filed March 16,1882. (No model.)

To all whom it may concern 7 Be it known that we, WILLIAM B. GUERN- sin,of Norwich, in the county of Ohenango and State of New York, and WILLIAMB. TURNER, of the'city, county, and State of New York. both citizensofthe United States, have invented a new and useful Improvement inLocomotive-Brakes, of which the following is a specification.

10 Our invention relates to driver-brakes for locomotives, and itsobject is to provide means for applying equal and simultaneous pressureto both sides of each of the wheels.

Equalizing-levers have long been used for r 5 applying pressuresimultaneously to both sides of car-wheels, the power being exertedthrough a the medium of transverse beams extending from side tosidebeneat-h the deck. Such appliances are manifestly inapplicable toloco- 2o motives.

Brake-shoes-have been arranged between the opposed faces of two adjacentlocomotivewheels, with means for applying the pressure simultaneously tosuch opposed faces. This mode of operation is objectionable, in that itresults in unbalanced sidewise pressure against the wheels, which actson the bearings with very injurious effect.

Our invention consists in mechanism by which equal pressure is appliedsimultaneously to opposite sides of the respective drivingwheels bymeans of attachments and connections in the plane of the wheels, ornearly so. To this end we hinge the brake-shoes to levers 3 5constituting their mode of support and attachment, and connectedtogether by bars or rods 1 above the wheels in such a manner that a sibmultaneous movement may be applied to the 1 whole from a common motor.

4o Our invention further consists in employing and combining for thispurpose levers of diflercut orders, substantially as hereinafter deportions of the frame of a locomotive with our systemof brakes appliedunder several modi- 5o fications.

"A A represent brake-shoes, jointed at B B to levers G O, fulcrumed at c0, respectively,

to the locomotive-frame F, or to a suitable attachment thereto, 0 0being levers of the first order, and G G levers of the second order. Theupper ends of the levers O and O of each pair are connected by rigidrods or bars E E,

to the inner ends of which rods are jointed rigid links J, connected bya Y-piece, I, for imparting simultaneous movement thereto in eitherdirection.

The steam-cylinder for actuating the brakes may be mounted upon theframe For other part of the locomotive in any suitable place orposition.

We have shown a cylinder at G, the pistonrod of which is connected by apitman, H, with one end of a bell-crank lever, L, fulcrumed at l, thearm L of which is jointed at t' to the extremity of the Y-piece I. Itwill now appear that a draft or tensional strain applied to the pitman Hby steam in the cylinder G will,

through the medium of the bell-crank lever L L, Y-connection 1, links J,and rods E, force all of the shoes A A A A simultaneously in contactwith the treads of the driving-wheels D D, thus applyingbraking-pressure with equal force on the opposite sides of each wheel.

It preferred, the cylinder may be mounted So in vertical positionbetween the wheels, as shown in dotted lines at G, so as to act on theY-piecesI bya direct thrust of its piston -rod H, with the effectalready described.

As another modification, we have shown in 8 5 dotted lines at G ahorizontal cylinder above the Wheels, which may contain two pistons, thesteam being admitted between the same, causing them to exert a directthrust on the bars E E through their piston-rods H or a 0 single pistonmay be used in the cylinder G with like effect by transposing the leversO O of one of the wheels only, so that pressure may be appliedsimultaneously to the inside shoes by means of one lever of the firstand one of 5 the second order by a longitudinal thrust in one direction,and in like manner to the outside shoes by one lever of the first orderand one of the second.

A brake system constituted substantially as above described is of courseused on each side of the locomotive, and, if desired, the two systemsmay be connected by a transverse shaft taking the place of the fulcruml, which for this purpose may be placed either above or below theboiler, thereby enabling the brakes on both sides of the locomotive tobe actuated simultaneously by a single motor.

Having thus described our invention, the following is what we claim asnew therein and desire to secure by Letters Patent:

1. In a driver-brake forlocomotives,tl1c combination of a suitablemotor, one or more pairs of brake-shoes, arranged on opposite or nearlyopposite sides of the respective wheels, levers to which saidbrake-shoes are hinged, constituting the means of support, attachment,and operation of the shoes, and connections between the levers, all inthe plane of the wheels, or nearly so, substantially as herein shown anddescribed.

2. In a driver-brake for locomotives, the combination of a suitablemotor and one or more pairs of brake-shoes, applying simultaneouspressure to opposite or nearly opposite sides of each driving-wheel, andactuated simultaneously by levers of different orders, constituting themeans of attachment and suspension of the brake-shoes, the whole beingin the plane of the wheels, or nearly so, substantially as hereinbeforcset forth.

3. In a driver-brake for locomotives, a system of brake-shoes mounted orsuspended by levers of different orders connected substantially as setforth, so as to communicate simultaneously an equal motion to all theshoes of 40 the system from a common motor, the said brake-shoes andconnections being in the plane of the wheels, or nearly so.

W. B. GUERNSEY. WILLIAM B. TURNER.

Witnesses FREDERICK GRAsMUoK, O. H. BETZEMAN.

